Ekko isnt OP
I recently just beat one with Urgot mid. On like my 4th or 5th time using urgot. Granted urgot is a little tanky, but the guy has zero mobility.
How did I beat him?? Playing smart.
I payed attention to him, Didnt get hit by his Q's, backed off or to the side when I saw him W, out poked him, and payed attention to the situation when his shadow was roaming around.
I also beat one jungleing as well, with those same principles.
Yes, ekko is strong. Is he OP? No. He just requires you to be a little more vigilant and outplay him and his kind of easy to dodge abilities. People would jus rather complain after they lost to him instead of paying attention to WHY they lost, and learning something
He is outplayable, without a huge amount of effort..